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Topic Review (Newest First)

10-29-2009 10:02 AM

TLFerrill

double clutching is when you have to shift from 1st to neutral to second to neutral to third and so on in old old cars with unsyncronized clutches. i've also heard truckers have to do it sometimes uphill but they may not be true. Also a good method to use if your clutch is completely gone to make it to the garage. i think the powershifting confusion came from f&f, but that conversation has been had way too many times.

ya, clutch-kicking would be an interesting thing to try though. i guess if your car was so underpowered or heavy that the energy gain of letting it free-rev for that second and going the next second was greater than letting the car rev in gear for two seconds this would make sense. possible i suppose.

10-21-2009 03:32 PM

1sicfuc

Ya I see, i mean hear.. honda's and acura's do this all the time at the drags. It wont do anything to make you faster. All your doing is stopping the car from accellerating and the boost or kick of power you feel is just the car starting to accelerate again. Only time this helps you is if your rear wheel drive going into a turn, pop the clutch, tug the e brake and DRIFT that sh!t. It is pointless on a drag race!

10-18-2009 07:02 PM

focusmaniaczx3

why would he need a tow truck to pick up pieces of his transmission? this isnt any rougher on the car then shifting gears hard and its very doubtful that doing this just a handful of times would burn the clutch enough to leave him stranded. you would have to pull the e-brake and sit and slip the clutch for several minutes to do that much damage.

Just make sure you bring a tow truck to pick you and your transmission up you leave behind on the track.

10-18-2009 04:27 PM

SquillyB

I'm sure depending on where you are in the country everything is called something different. I wasn't sure exactly what you were referring to so I listed both shifting methods.
they are different. However either or will slow your cars forward progress. I could get more technical on my answer but it involves complex math

10-18-2009 04:24 PM

Dcl2049

I don't think it will. Seems like there would be a big loss in efficiency. You're burning off power slipping the clutch. And I don't think the energy stored rotating the crankshaft assembly will be anything near the energy that otherwise would have been transmitted to the wheels.

10-18-2009 03:31 PM

focusmaniaczx3

agreed ^^ this might be beneficial possibly maby. but i wouldnt make a habit out of it.

10-18-2009 01:08 PM

edmhatch

death 2 clutch over time :)

10-18-2009 05:19 AM

fhg959

Quote:

Originally Posted by focusmaniaczx3

oh i know what you're saying. to give you a kick in the pants like you are changing gears again in between gears. ive done this on the street before when i launch from a roll with great success but ive never tried what you are suggesting on a strip. why dont you try it and see how it works out. i think it will slow you down but ive been wrong God only knows how many times in the past. like looking at a duratec engine in a focus for the first time and saying WTF! the header is made out of plastic! oh fuuuunny

Yeah, something like that. I'm going to try it once or twice next week and see what happens.

Quote:

Originally Posted by SquillyB

If your talking about double clutching aka power shifting as I think it was referred to here, then in a drag race I would say no it won't help more than likely hurt your times. By NOT accelerating if even for an instant the suspension as well as other key factors will "relax" and this is not a good thing when talking forward acceleration across a specific distance ie 1/4 mile. Anything that prohibits forward acceleration will show in your time slips, this includes lifting or clutching. Unless the power increase at the higher RPM that it "jumps" to after taping the clutch while accelerating under WOT is sufficient enough to cover the lack of power during the pedal depress duration as well as having the capability to produce more power than the original rpm curve, then NO this is not beneficial to your drag times.
You also might want to find out where your car makes the most power, at what rpm does it start and where does it end. If you go playing around in your power band area and don't know what your doing, then you will suffer tremendous losses while drag racing.

Nope I'm not talking about double clutching, and I could be wrong, but you are the first person that I heard that calls double clutching and powershifting the same thing (IIRC they are two very different driving techniques). And I would like to re-quote you on this;
" Anything that prohibits forward acceleration will show in your time slips, this includes lifting or clutching. Unless the power increase at the higher RPM that it "jumps" to after taping the clutch while accelerating under WOT is sufficient enough to cover the lack of power during the pedal depress duration as well as having the capability to produce more power than the original rpm curve, then NO this is not beneficial to your drag times."
^^^Your explanation is kind of what I was looking for. I'm going to PM to see if you can explain me this more in detail.

Quote:

Originally Posted by DJslurp1200

Fail

Thanks, that's the most helpful post so far. If you ever run for president, count with my vote

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